GeoLog

Field Work

Imaggeo on Mondays: What happens to mines when they become redundant?

September 18, 2017
Imaggeo on Mondays: What happens to mines when they become redundant?
Ore processing plant, Messida, El Kala, Algeria . Credit: Issaad Mouloud (distributed via imaggeo.egu.eu)

When the minerals run out, or it is no longer profitable to extract the resources, mines shut down. Prior to issuing a permit for the exploitation of a resource, most regulators require assurance that once the mine closes it, or the activities carried out at the site, will not present a risk to human health or the environment. Ongoing monitoring of a mine once it is decommissioned is required to e ...[Read More]

Imaggeo on Mondays: Low tide at Alexandra Fjord

August 28, 2017
Imaggeo on Mondays: Low tide at Alexandra Fjord
Low tide at Alexandra Fjord . Credit: Martin Brummell (distributed via imaggeo.egu.eu).

Today’s post takes us to the far northern reaches of our planet, to a desert like nothing you’ve seen before. This picture is a view to the north across Alexandra Fjord, on the east coast of Ellesmere Island, in the Canadian High Arctic, with Sphynx island in the middle of the fjord. The south shore of Alexandra Fjord includes a polar oasis, an area of tundra vegetation and relatively mild climati ...[Read More]

Imaggeo on Mondays: A dramatic avalanche from Annapurna South

August 7, 2017
Imaggeo on Mondays: A dramatic avalanche from Annapurna South
A dramatic avalanche from Annapurna South . Credit: Emily Hill (distributed via imaggeo.egu.eu)

The Annapurna massif is located in an imposing 55 km long collection of peaks in the Himalayas, which behave as a single structural block. Composed of one peak (Annapurna I Main) in excess of 8000 m, a further thirteen peaks over 7000 m and sixteen more of over 6000 m, the massif forms a striking structure within the Himalayas. Annapurna South (pictured in today’s featured image), the 101st talles ...[Read More]

Volcanic ash layers in Svalbard hold clues to the formation of the North Atlantic

August 4, 2017
Volcanic ash layers in Svalbard hold clues to the formation of the North Atlantic
This is what the Central Basin of Svalbard looks like today. Since the formation of the sedimentary sequence, the area has been uplifted and then eroded. Rocks that were formed in shallow seas now form high points cut by deep fjords and glaciers. Credit: Morgan Jones

This guest post by Dr Morgan Jones (a Researcher in Volcanology at the Centre of Earth Evolution and Dynamics (CEED) at the University of Oslo, Norway) describes the latest findings of his multidisciplinary research into how the North Atlantic formed. His open access study, in collaboration with colleagues at CEED and the Massachusetts Institute of Technology (MIT) is published in the Nature Journ ...[Read More]